/Engine/Source/Runtime/Engine/Public/ObjectCacheEventSink.h
static void NotifyUsedMaterialsChanged_Concurrent ( const [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * PrimitiveComponent, const [TArray](API\Runtime\Core\Containers\TArray)< [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * > & UsedMaterials )